The Assassins Creed franchise is set to return this fall with the fourth entry in the series – Assassins Creed Revelations. At Ubisoft’s booth they ran live demos on large screens on the showroom floor. Designer Pascal controlled the demo from behind the scenes with Eric Priceman narrating the demonstration.

Revelations is the final chapter in Ezio’s storyline and marks the return of the original protagonist Althiar. The demo takes place halfway through the game in Constantinople. Ezio and the Templar's are locked in a race to find a series of artifacts that will unlock Altiars past.

During the middle of the demo Pascal showed us a brand new gameplay mechanic – throwable smoke bombs. As you can see in the demo footage the bomb is aimed using an arching trajectory meter similar to what we’ve seen in Gears of War. Ubisoft Montreal has also added an explosion radius meter that appears when targeting an enemy. Once the bomb has detonated Ezio can use the distraction to escape his foes.

Another new feature showcased during the E3 2011 demo was “eagle senses”, which highlight enemies in a colour-inverted night vision effect. This feature not only assists with assassinations but also stealth escapes.

Wrist mounted explosions and smoke bombs aren’t the only new tools at his disposal. In order to make his way around the city Ezio is able to use a series of ziplines that the assassins have set up around the city. They allow him to quickly zip from location to another undetected.

The demo closed out with an aerial assassination using the hook-blades and the fabled greek fire. The fire effects where very impressive in person. Check out the full demo in our brand new embedded video player below.

Ubisoft had a second playable demo at their booth as well as the developer walkthrough demo we watched today. Check back later in the week for impressions of that demo. Assassins Creed Revelations will ship this November for the Xbox 360.